title: Effectiveness over time of varicella vaccine.
mesh_terms: D000293:Adolescent; D000367:Age Factors; D016022:Case-Control Studies; D002644:Chickenpox / Q000453:epidemiology* / Q000276:immunology / Q000517:prevention & control; D019433:Chickenpox Vaccine / Q000008:administration & dosage / Q000276:immunology*; D002648:Child; D002675:Child, Preschool; D004279:DNA, Viral / Q000032:analysis; D005260:Female; D014645:Herpesvirus 3, Human / Q000276:immunology / Q000302:isolation & purification; D006801:Humans; D007110:Immunity, Active; D007115:Immunization Schedule; D007223:Infant; D008297:Male; D016133:Polymerase Chain Reaction; D013997:Time Factors; D014611:Vaccination / Q000706:statistics & numerical data*
chemical_list: D019433:Chickenpox Vaccine; D004279:DNA, Viral